The Ford Barn

nkaminar · 08-10-2024, 10:53 AM

If the car idles better with gas off then there are two possible problems. Either the gas level in the carburetor is too high or the idle mixture adjustment is off, likely too rich.

You can get a tool that lets you see the gas level in the carburetor with the engine running or not. With the Zenith carburetor, the idle mixture jet controls the amount of air mixed in with the fuel. Screw it out and more air and leaner mixture. Did you try to adjust the idle mixture screw?

Here is a site that will help you figure out what is wrong: https://modela.org/symptoms.html

MotownMachine · 08-10-2024, 01:09 PM

Quote:

Originally Posted by nkaminar

If the car idles better with gas off then there are two possible problems. Either the gas level in the carburetor is too high or the idle mixture adjustment is off, likely too rich.

You can get a tool that lets you see the gas level in the carburetor with the engine running or not. With the Zenith carburetor, the idle mixture jet controls the amount of air mixed in with the fuel. Screw it out and more air and leaner mixture. Did you try to adjust the idle mixture screw?

I have not tried the idle screw, only because I have never messed with it before, but the mixture is definitely too rich. Plenty of smog coming from the tail pipe when running.

MotownMachine · 08-11-2024, 08:21 AM

Problem solved!

Everything seems to be fine now. Turns out my GAV got stuck open about 2-1/2 turns. When turning it before, it felt all the way seated and wouldn't budge anymore to the right. Gave it a little twist this morning and just kept turning and turning until idle was back to normal.

Thanks to everyone for their input

08-10-2024, 10:53 AM	#1
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 6,854	Re: Another No-Start If the car idles better with gas off then there are two possible problems. Either the gas level in the carburetor is too high or the idle mixture adjustment is off, likely too rich. You can get a tool that lets you see the gas level in the carburetor with the engine running or not. With the Zenith carburetor, the idle mixture jet controls the amount of air mixed in with the fuel. Screw it out and more air and leaner mixture. Did you try to adjust the idle mixture screw? Here is a site that will help you figure out what is wrong: https://modela.org/symptoms.html __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 08-10-2024 at 11:03 AM.

08-11-2024, 08:21 AM	#3
MotownMachine Junior Member Join Date: Oct 2021 Location: Western Maryland Posts: 29	Re: Another No-Start Problem solved! Everything seems to be fine now. Turns out my GAV got stuck open about 2-1/2 turns. When turning it before, it felt all the way seated and wouldn't budge anymore to the right. Gave it a little twist this morning and just kept turning and turning until idle was back to normal. Thanks to everyone for their input